Vacuum power device.



H. W. HAMILTON.

VACUUM POWER DEVICE.

APPLICATION FILED JUNE 4 1915.

1 ,21 9,938. Patented Mar. 20, 1917.

1 INVENTOR 3 2 1/7 mar/7,9, .u v

ED {STATES PATENT omzuon.

may w. HAMILTON,- or INDIANAPQLIS, mnmim.

vacuum rowan DEVICE.

To all whom it may concern:

Beit known that I, HARRY W. HAMILTON,

a citizen of the United States,residing at Indianapolis, in'the countyof Marion and State of Indiana, have invented a new and useful Vacuum,Power Device, of which the gine, as the modern low-built automobileoften precludes a gravity feed of the fuel to the carbureter.

. In carrying out my invention, I provide a chamber having a. movablewall, said chamber being connected through two valves to a partialvacuum, such as the intake manifold of an internal combustion engine,

and to the atmosphere, respectively and connect such valves to saidmovable wall so that the movement of the wall to enlarge the chambercauses theopening of the valve connected to the partial vacuum and theclosing of the valve connected to the atmosphere, and the movement ofthe movable wall to ensmall the chamber causes the closing of the first'valve and the opening'of the second valve. The movement of the movablewall causes the opening and closing of the valves, and the opening andclosing of the valves causes changes in the pressure of the chamber,which changes'in turn cause the moving of the movable wall in oppositedirections. In the preferred form of my in vention, the movable wall isin the form of a diaphragm, and in addition to furnishing the wall ofthe chamber already mentioned also fu nishes a movablewall of anotherchambe which is connected through two automatic valves to a source offuel supply and to a carburetor, so that asthe diaphragm moves there isa pumping action to force the fuel from the source of fuel supply to thecarburetor.

The accompanying drawing illustrates my invention. Figure 1 is asectional-view through a power device embodying my invention, showingdiagrammatically its connections to an mternal combustion engine,

Specification of ietters Patent.

thereof closed to the intake manifold and opened to the atmosphere; andFig. 3 is a detail showing the valves both in closed position, whichoccurs when the diaphragm is in an intermediate enlarge the chamber;

An internal combustion enginelO, shown as having four cylinders, isshown diagrammaticallyfls having the various cylinders connectedto acommon intake manifold 11, which in turn is connected by a 'supply pipePatented Mar, 20, 1917, am utation filed June 4, 1915. Serial no.32,065.

position and moving to v 12 to a carbureter 13. There is also a fuelsupply tank 14, which,has a filling cap 1'5 provided with a vent 16. Allthese are of any deslred type, and the engine operates in the usualmanner to maintain a partial vacuum in the intake manifold 11 andintake,

supply pipe 12.

he vacuum. power device comprises a casing 20 which provides a chamber21, one,

end of which chamber is provided with a movable wall, which in thepreferred form of my invention is a flexible diaphragm 22. Thisdiaphragm is clamped at its periphery between a flange 23 on the casing20 and the rim of a. cupped cover 24, which protects the diaphragm 22and with it forms a sec- I 0nd chamber 25, which-is separated from thechamber 21 by the diaphragm 22 so that the two chambers are entirelydistinct. The chamber 21 is connected to the intake manifold 11 by apipe '30, the entrance to which from the chamber 21 is in the form of avalve 'seat'31 which cooperates with a movable valve 32. This valve 32is carried by a plunger 33, one end of whichbears against the diaphragm22. Preferably aspring 34: is provided for forcing the plunger 33awayfrom thevalve'seat 31. The valve 32 and plunger 33 are connected bya "lost motion 1 connection, which in the form [shown-is provided by ahead 35 on the stem of the walve 32, this beach being slidably -mountedin a pocket 36 in the upper end of the 'plunger 33, and the head 35being shorter than the pocket 36 so that the desired lost motionis-provided. The plunger 33 is pivotally attached to the free end of anarm 37, the other end of which is pivotr'. V U

=ally mounted on a lug 38 on the inner wall of the casing 20. The arm 37is provided with-a cross pin 39 at an intermediate point, which crosspin receives the slotted head 40 of a pin 41 slidably mounted in abearing 42.

The upper end of the pin 42 cooperates with a ball 43 of a ball valve,the seat of which is provided by a plug 44 having a screwthreadedmounting in the casing 20 so that, it can be screwed in and out, a locknut 45- 'upper end of its movement causes the valve 32 to engage thevalve seat 31 to close the outlet from the chamber 21, and also causesthe pin 41 to lift'the ball 43 from. its seat to allow the ingress ofair from the atmosphere into the chamber 21. This causes the pressure inthe chamber 21 tobe restored,

whereupon the spring 34, assisted by the resilience of the diaphragm 22,returns such diaphragm to normal position, thus allowing the ball 43 toreturn to its seat, and then, after the lost motion provided by the head35 and pocket 36 has been taken up, causing the valve 32 to be movedfrom its seat 31 to open the communication from the chamber 21 to theintake manifold. Then the-operation just described is repeated.

The power produced by the movements of the diaphragm 22 may be used forany desired purpose. In the arrangement shown, this power is used forpumping fuel from the supply tank'14 to the carbureter 13. For

this purpose, the chamber 25 is connected through a check valve and apipe 51 to the fuel supply tank 14, and through a check valve 52 and apipe 53 to the fuel inlet of the carbureter 13. The check valve 50 openstoward the chamber 25, to permit fuel from the tank 14 to enter suchchamber, while the check valve 52 opens away from such chamher, topermit the fiow of fuel therefrom.

Thus as the diaphragm is moved up and down as above described, thechamber 25 is alternately enlarged and ensxnalled, and

fuel from the tank 14 is first drawn into such chamber 25, through thevalve 50, and then forced from such chamber to the carbureter 13,through the valve 52. The valve 52 being i erted, in the position shown,so that it ill not drop to its seat by gravity, an actuating. or settingspring 54 is provided for normally pressing it to its seat. The deviceis arranged to pump fuel at a greater chamber 25.

carbureter. In the arrangement shown, the

closing of the float valve in the carbureter merely blocks th'eoutletpassageway frontthe chamber 25, and so stops the action of the devicewhile the carbureter float valve is closed, by preventing the ensmallingof such device and the supply of fuel to the carbureter to beintermittent. If it is preferred that the action of the device becontinuous, there may be provided in the pipe 53 an overflow reservoirlocated at a' higher level than the carbureter 13, the overflow pipefrom said reservoir leading back to the supply tank 14.

I claim as my invention:

1. A vacuum power device, comprising a chamber having a movable wall, anoutlet valve from said chamber for connection to a partial vacuum, aninlet valve leading from the atmosphere to said chamber, and connectionsfrom said movable wall to said two valves for closing the first valveand opening the second valve by the movement of ,said wall to ensmallthe chamber and for opening the first valve and closing the second valveupon the movement 'ofsaid wall to enlarge the chamber, said connectionsincluding a lost motion connection between the movable wall and thefirst valve for delaying the opening of such valve.

2. A vacuum power device, comprising a hollow casing, a flexiblediaphragm closing said casing to provide a closed chamber therein, anoutlet valve from said chamber for connection to a partial vacuum, aninlet valve connecting said chamber with the atmosphere, a springtending to move said diaphragm in the direction to enlarge said chamber,and connections between said diaphragm and said two valves for closingthe first valve and opening the second upon the Thiscauses the action ofthe flexing of the diaphragm inward and for opening the first valve andclosing the second u'ponthe flexing of the diaphragm outward relative tosuch chamber, said connection between the diaphragm and the first valveincluding a lost motion connection which permits the opening of saidfirst valve to be delayed until after the outward flexing of thediaphragm has been partly completed.

3. A vacuum power device, comprising a hollow casing, a flexiblediaphragm closing said casing to provide a closed chamber therein, anoutlet valve from said chamber for connection to a partial vacuum, aninlet valve connecting said chamber with the atmosphere, and connectionsbetween said diaphragm and said two valves for closing the first valveand opening the second upon the flexing of the diaphragm inward andflexing of the diaphragm has been partly for opening the first Valve andclosing the completed. 10 second upon the fiexingof the diaphragm' Inwitness whereof, I have hereunto set outward relative to such chamber,said conmy hand at Indianapolis, Indiana, this 17th 7 5 motion betweenthe diaphragm and the day of May, A. D. one thousand nine hun-. firstvalveincluding a lost motion connecdred and fifteen.

tion which permitsthe opening of said first n valve to be delayed untilafter the outward HARRY W. HAMILTON.

